BATTERY ENERGY STORAGE SYSTEM

摘要

PURPOSE: A battery energy storage system is provided to optimize a battery energy storage system according to a current control and a power control method operated by a second control mode and by controlling output current based on a first control mode. CONSTITUTION: A power control device (220) comprises a current command value calculation unit (320) calculating an output current command value according to a charging setup current or a charging setup power; a current control unit (330) controlling the output current of a power conversion unit (340); the power conversion unit (340) converting the direct current of a battery into alternative current; and a charging setup power calculation unit (350). [Reference numerals] (310) Mode selection unit; (320) Current command value calculation unit; (330) Current control unit; (340) Power conversion unit; (350) Charging setup power calculation unit